package com.alibaba.csp.sentinel.dashboard.rule.nacos.gateway;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiDefinitionEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.nacos.api.config.ConfigService;

@Component("gatewayFlowRuleNacosProvider")
public class GatewayFlowRuleNacosProvider implements DynamicRuleProvider<List<GatewayFlowRuleEntity>> {

  @Autowired
  private ConfigService configService;
  @Autowired
  private Converter<String, List<GatewayFlowRuleEntity>> converter;

  @Override
  public List<GatewayFlowRuleEntity> getRules(String appName) throws Exception {
    String rules = configService.getConfig(appName+ NacosConfigUtil.GATEWAY_FLOW_DATA_ID_POSTFIX, NacosConfigUtil.GROUP_ID, 3000);
    if (StringUtil.isEmpty(rules)) {
      return new ArrayList<>();
    }
    return converter.convert(rules);
  }
}